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import asyncio
import logging
import os.path
import re
import time
from gpiozero import OutputDevice
import serial
import serial.tools.list_ports
LOGGER = logging.getLogger(__name__)
GPIO_PIN0 = 17
GPIO_PIN2 = 27
class UnclosableOutputDevice(OutputDevice):
"""
`OutputDevice` that never closes its pins. Allows for the last-written pin state to
be retained even after the `OutputDevice` is garbage collected.
"""
def __init__(
self, pin=None, *, active_high=True, initial_value=False, pin_factory=None
):
super().__init__(
pin,
active_high=active_high,
initial_value=initial_value,
pin_factory=pin_factory,
)
self._pin.close = lambda *args, **kwargs: None
self.pin_factory.close = lambda *args, **kwargs: None
def discover_port():
"""discover zigate port"""
devices = list(serial.tools.list_ports.grep("ZiGate"))
if devices:
port = devices[0].device
LOGGER.info("ZiGate found at %s", port)
else:
devices = list(serial.tools.list_ports.grep("067b:2303|CP2102"))
if devices:
port = devices[0].device
LOGGER.info("ZiGate probably found at %s", port)
else:
LOGGER.error("Unable to find ZiGate using auto mode")
raise serial.SerialException("Unable to find Zigate using auto mode")
return port
def is_pizigate(port):
"""detect pizigate"""
# Suppose pizigate on /dev/ttyAMAx or /dev/serialx
if port.startswith("pizigate:"):
return True
port = os.path.realpath(port)
return re.match(r"/dev/(tty(S|AMA)|serial)\d+", port) is not None
def is_zigate_din(port):
"""detect zigate din"""
port = os.path.realpath(port)
if re.match(r"/dev/ttyUSB\d+", port):
try:
device = next(serial.tools.list_ports.grep(port))
# Suppose zigate din /dev/ttyUSBx
return device.description == "ZiGate" and device.manufacturer == "FTDI"
except StopIteration:
pass
return False
def is_zigate_wifi(port):
"""detect zigate din"""
return port.startswith("socket://")
def set_pizigate_running_mode():
LOGGER.info("Put PiZiGate in running mode")
gpio0 = UnclosableOutputDevice(pin=GPIO_PIN0, initial_value=None)
gpio2 = UnclosableOutputDevice(pin=GPIO_PIN2, initial_value=None)
gpio2.on()
time.sleep(0.5)
gpio0.off()
time.sleep(0.5)
gpio0.on()
time.sleep(0.5)
def set_pizigate_flashing_mode():
LOGGER.info("Put PiZiGate in flashing mode")
gpio0 = UnclosableOutputDevice(pin=GPIO_PIN0, initial_value=None)
gpio2 = UnclosableOutputDevice(pin=GPIO_PIN2, initial_value=None)
gpio2.off()
time.sleep(0.5)
gpio0.off()
time.sleep(0.5)
gpio0.on()
time.sleep(0.5)
def ftdi_set_bitmode(dev, bitmask):
"""
Set mode for ZiGate DIN module
"""
import usb
BITMODE_CBUS = 0x20
SIO_SET_BITMODE_REQUEST = 0x0B
bmRequestType = usb.util.build_request_type(
usb.util.CTRL_OUT, usb.util.CTRL_TYPE_VENDOR, usb.util.CTRL_RECIPIENT_DEVICE
)
wValue = bitmask | (BITMODE_CBUS << BITMODE_CBUS)
dev.ctrl_transfer(bmRequestType, SIO_SET_BITMODE_REQUEST, wValue)
def set_zigatedin_running_mode():
import usb
dev = usb.core.find(idVendor=0x0403, idProduct=0x6001)
if not dev:
raise RuntimeError("ZiGate DIN not found.")
LOGGER.info("Put ZiGate DIN in running mode")
ftdi_set_bitmode(dev, 0xC8)
time.sleep(0.5)
ftdi_set_bitmode(dev, 0xCC)
time.sleep(0.5)
def set_zigatedin_flashing_mode():
import usb
dev = usb.core.find(idVendor=0x0403, idProduct=0x6001)
if not dev:
raise RuntimeError("ZiGate DIN not found.")
LOGGER.info("Put ZiGate DIN in flashing mode")
ftdi_set_bitmode(dev, 0x00)
time.sleep(0.5)
ftdi_set_bitmode(dev, 0xCC)
time.sleep(0.5)
ftdi_set_bitmode(dev, 0xC0)
time.sleep(0.5)
ftdi_set_bitmode(dev, 0xC4)
time.sleep(0.5)
ftdi_set_bitmode(dev, 0xCC)
time.sleep(0.5)
def async_run_in_executor(function):
"""Decorator to make a sync function async."""
async def replacement(*args):
return await asyncio.get_running_loop().run_in_executor(None, function, *args)
replacement._sync_func = function
return replacement
# Create async version of all of the above functions
async_set_pizigate_running_mode = async_run_in_executor(set_pizigate_running_mode)
async_set_pizigate_flashing_mode = async_run_in_executor(set_pizigate_flashing_mode)
async_set_zigatedin_running_mode = async_run_in_executor(set_zigatedin_running_mode)
async_set_zigatedin_flashing_mode = async_run_in_executor(set_zigatedin_flashing_mode)
async_is_pizigate = async_run_in_executor(is_pizigate)
async_is_zigate_din = async_run_in_executor(is_zigate_din)
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